Numbers 34:3 - Coke's Commentary on the Holy Bible

Then your south quarter shall be from the wilderness of Zin— Though by the land of Canaan is sometimes understood the whole land of promise possessed by the twelve tribes; yet the signification is here and commonly restrained to the country west of Jordan. Moses himself has made this distinction, Deuteronomy 2:29. The south bounds were to end at the east point of the Salt or Dead Sea, running by the borders of Idumea, to the most northern point of the river Nile, (Numbers 34:5.) and so to the Mediterranean Sea westward, and along by the wilderness of Zin, (Numbers 34:4.) meeting the eastern bounds towards the river Jordan. See Genesis 14:3.Joshua 15:2.